diff --git a/src/apps/http/altcp_proxyconnect.c b/src/apps/http/altcp_proxyconnect.c
index 9019bfa9..6ce56a43 100644
--- a/src/apps/http/altcp_proxyconnect.c
+++ b/src/apps/http/altcp_proxyconnect.c
@@ -297,16 +297,6 @@ altcp_proxyconnect_lower_err(void *arg, err_t err)
 
 /* setup functions */
 
-static void
-altcp_proxyconnect_remove_callbacks(struct altcp_pcb *inner_conn)
-{
-  altcp_arg(inner_conn, NULL);
-  altcp_recv(inner_conn, NULL);
-  altcp_sent(inner_conn, NULL);
-  altcp_err(inner_conn, NULL);
-  altcp_poll(inner_conn, NULL, inner_conn->pollinterval);
-}
-
 static void
 altcp_proxyconnect_setup_callbacks(struct altcp_pcb *conn, struct altcp_pcb *inner_conn)
 {
diff --git a/src/apps/http/http_client.c b/src/apps/http/http_client.c
index 342d5ddf..a7d5d9f8 100644
--- a/src/apps/http/http_client.c
+++ b/src/apps/http/http_client.c
@@ -261,7 +261,7 @@ http_wait_headers(struct pbuf *p, u32_t *content_length, u16_t *total_header_len
         memset(content_len_num, 0, sizeof(content_len_num));
         if (pbuf_copy_partial(p, content_len_num, content_len_num_len, content_len_hdr + 16) == content_len_num_len) {
           int len = atoi(content_len_num);
-          if ((len >= 0) && (len < HTTPC_CONTENT_LEN_INVALID)) {
+          if ((len >= 0) && ((u32_t)len < HTTPC_CONTENT_LEN_INVALID)) {
             *content_length = (u32_t)len;
           }
         }
@@ -571,10 +571,9 @@ httpc_init_connection_common(httpc_state_t **connection, const httpc_connection_
 }
 
 /**
- * @ingroup httpc 
  * Initialize the connection struct
  */
-err_t
+static err_t
 httpc_init_connection(httpc_state_t **connection, const httpc_connection_t *settings, const char* server_name,
                       u16_t server_port, const char* uri, altcp_recv_fn recv_fn, void* callback_arg)
 {
@@ -583,10 +582,9 @@ httpc_init_connection(httpc_state_t **connection, const httpc_connection_t *sett
 
 
 /**
- * @ingroup httpc 
  * Initialize the connection struct (from IP address)
  */
-err_t
+static err_t
 httpc_init_connection_addr(httpc_state_t **connection, const httpc_connection_t *settings,
                            const ip_addr_t* server_addr, u16_t server_port, const char* uri,
                            altcp_recv_fn recv_fn, void* callback_arg)
diff --git a/src/include/lwip/apps/altcp_proxyconnect.h b/src/include/lwip/apps/altcp_proxyconnect.h
index 46902662..2dd1d919 100644
--- a/src/include/lwip/apps/altcp_proxyconnect.h
+++ b/src/include/lwip/apps/altcp_proxyconnect.h
@@ -54,6 +54,7 @@ struct altcp_proxyconnect_config {
 
 
 struct altcp_pcb *altcp_proxyconnect_new(struct altcp_proxyconnect_config *config, struct altcp_pcb *inner_pcb);
+struct altcp_pcb *altcp_proxyconnect_new_tcp(struct altcp_proxyconnect_config *config, u8_t ip_type);
 
 struct altcp_pcb *altcp_proxyconnect_alloc(void *arg, u8_t ip_type);